Add Generalized Perspective Projection by Kooima (#70)

Author: ShadowMitia

resources/index.html

@@ -82,6 +82,8 @@
 		## Image-Based Lighting
 		* [The Definitive Weta Digital Guide to IBL](https://www.fxguide.com/fxfeatured/the-definitive-weta-digital-guide-to-ibl/)
 
+		## Camera
+		* [Generalized Perspective Projection](https://web.archive.org/web/20191110002841/http://csc.lsu.edu/~kooima/articles/genperspective/index.html)
 
 		# Physically Based Rendering
 		* [Physically Based Rendering: From Theory To Implementation](https://www.pbr-book.org/)